• Study Resource
  • Explore Categories
    • Arts & Humanities
    • Business
    • Engineering & Technology
    • Foreign Language
    • History
    • Math
    • Science
    • Social Science

    Top subcategories

    • Advanced Math
    • Algebra
    • Basic Math
    • Calculus
    • Geometry
    • Linear Algebra
    • Pre-Algebra
    • Pre-Calculus
    • Statistics And Probability
    • Trigonometry
    • other →

    Top subcategories

    • Astronomy
    • Astrophysics
    • Biology
    • Chemistry
    • Earth Science
    • Environmental Science
    • Health Science
    • Physics
    • other →

    Top subcategories

    • Anthropology
    • Law
    • Political Science
    • Psychology
    • Sociology
    • other →

    Top subcategories

    • Accounting
    • Economics
    • Finance
    • Management
    • other →

    Top subcategories

    • Aerospace Engineering
    • Bioengineering
    • Chemical Engineering
    • Civil Engineering
    • Computer Science
    • Electrical Engineering
    • Industrial Engineering
    • Mechanical Engineering
    • Web Design
    • other →

    Top subcategories

    • Architecture
    • Communications
    • English
    • Gender Studies
    • Music
    • Performing Arts
    • Philosophy
    • Religious Studies
    • Writing
    • other →

    Top subcategories

    • Ancient History
    • European History
    • US History
    • World History
    • other →

    Top subcategories

    • Croatian
    • Czech
    • Finnish
    • Greek
    • Hindi
    • Japanese
    • Korean
    • Persian
    • Swedish
    • Turkish
    • other →
 
Profile Documents Logout
Upload
ISSCC D03_04 Karthik
ISSCC D03_04 Karthik

... Inphi, Santa Clara, CA, Inphi, Singapore, Singapore, 3Inphi, Irvine, CA ...
handyboard
handyboard

... – R/W: 8 data bus wires function also as address wires, transmit 8 lower-order bits of address; then they function as data wires, receive/transmit data byte – Upper 7 address bits - normal – Lower 8 address bits are a multiplexed address/data bus, stored in 8-bit Latch (74HC373) – Address Strobe tel ...
AP65500 Description Pin Assignments
AP65500 Description Pin Assignments

... The AP65500 is a 5A current mode control, synchronous buck regulator with built in power MOSFETs. Current mode control assures excellent line and load regulation and a wide loop bandwidth for fast response to load transients. The Figure 1 depicts the functional block diagram of AP65500. The operatio ...
Single-Inductor Dual-Output Buck-Boost Power Factor
Single-Inductor Dual-Output Buck-Boost Power Factor

... The above diagram discussed about the wave form difference between current and voltage. the voltage and current waveforms differs only by varying the value in reference voltageThe circuit configuration of multiple output ac/dc converter shown in Fig.1 is complex and suffers from high cost, with mult ...
Modeling and Simulation of Static VAR Compensator Controller for
Modeling and Simulation of Static VAR Compensator Controller for

... An SVC is a shunt connected FACTS device whose output can be adjusted to exchange either capacitive or inductive currents to the connected system. This current is controlled to regulate specific parameters of the electrical power system (typically bus voltage). The thyristor has been an integral par ...
Slide 1
Slide 1

article: Brushed DC electric motor
article: Brushed DC electric motor

BDTIC  EiceDRIVER 2 E D 3 0 0 C 1 7 -...
BDTIC EiceDRIVER 2 E D 3 0 0 C 1 7 -...

... Undervoltage monitoring is implemented for both secondary sides, positive and negative driver supply voltages are monitored. The Signal and Logic side is not monitored. Undervoltage lockout functionality in both driver channels ensures correct IGBT switching operation. If the absolute value of one o ...
ENGR 210 Lab 6
ENGR 210 Lab 6

... varying signals, and the oscilloscope, which can be used to measure and characterize these signals. This lab is in two parts: (1) a computer simulation which will show you the basic operation of the function generator and the oscilloscope, and (2) some simple laboratory measurements you can make wit ...
RESET MAX8530/MAX8531 Dual Low-Dropout Linear Regulators with
RESET MAX8530/MAX8531 Dual Low-Dropout Linear Regulators with

... The MAX8530/MAX8531 are low-power, low-dropout, low-quiescent current linear regulators with reset designed primarily for battery-powered applications. For preset output voltages, refer to the Output Voltage Selector Guide. Other combinations between 1.5V and 3.3V are available in 50mV increments. T ...
Aalborg Universitet
Aalborg Universitet

CD Jitter - mh
CD Jitter - mh

... crystal it doesn't mean it's perfect. There are good and bad oscillator circuits and in this context the ones that are bad have higher "phase noise" than the good ones. This phase noise (the same thing as jitter) is caused by the oscillator not being highly tuned to a single frequency, but wandering ...
NE5532,NE5532A Texas Instruments Datasheet
NE5532,NE5532A Texas Instruments Datasheet

... Supply voltage, VCC+ (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 V Supply voltage, VCC– (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
BD8143MUV : Power Management ICs
BD8143MUV : Power Management ICs

... The OSC generates the frequency that determines the Amp's refresh time. External input can be selected using serial input. ・Power On Reset When the digital power supply DVCC is activated, each IC generates a reset signal to initialize the serial interface, registers. Adding a 1,000 pF capacitor to t ...
Neo900 Infrared Subsystem
Neo900 Infrared Subsystem

LM1881 Video Sync Separator (Rev. F)
LM1881 Video Sync Separator (Rev. F)

A New Energy Recovery Circuit for the Capacitive Load using the
A New Energy Recovery Circuit for the Capacitive Load using the

... panel capacitance (CP) because the dielectric and MgO layers cover the electrodes in the unit cell [1]. Recently, research interest toward developing a high luminance and high luminous efficiency mercury-free flat light sources has gained momentum [2]-[7]. It is also modeled as an equivalent panel c ...
RF3194 QUAD-BAND GSM POWER AMP MODULE Features
RF3194 QUAD-BAND GSM POWER AMP MODULE Features

... impedance presented to the PA varies, so does the output power and current to the power amplifier. If left uncontrolled, power amplifier current can peak at high levels that starve other circuitry, connected to the same supply, of the required voltage to operate. This can result in a reset or shutdo ...
The NEPTUNE power system: design from fundamentals
The NEPTUNE power system: design from fundamentals

... In Figure 2, switches S1, S2 and S4 are closed when the breaker is closed. The opening sequence begins with S4. The line current commutates into the capacitor C, and decays exponentially to zero. After a few hundred ms, the current is small enough that S1 can be opened, at which point the circuit ha ...
The Inside Story
The Inside Story

AP65403 Description Pin Assignments
AP65403 Description Pin Assignments

... The AP65403 is a 4A current mode control, synchronous buck regulator with built in power MOSFETs. Current mode control assures excellent line and load regulation and a wide loop bandwidth for fast response to load transients. The Figure 1 depicts the functional block diagram of AP65403. The operatio ...
BD6079GWL
BD6079GWL

PHYS 202 Notes, Week 7
PHYS 202 Notes, Week 7

... To represent alternating current (or voltage) graphically, we can use rotating vectors called phasors, which are drawn in phase diagrams. These are useful tools for visualizing current or voltage vs. time. In particular, it’s useful when we need to add or subtract alternating currents or voltages. A ...
DS1812 5V EconoReset with Active High Push-Pull Output FEATURES
DS1812 5V EconoReset with Active High Push-Pull Output FEATURES

... On Website ...
UPS product brochure
UPS product brochure

... When using in an environment at a high temperature, charging may be paused by charging temperature protection, then the charging time will be longer than specified time. “CS” will be displayed when charging temperature protection is operated. Conditions: With rated loads connected, at a rated input ...
< 1 ... 655 656 657 658 659 660 661 662 663 ... 1202 >

Pulse-width modulation



Pulse-width modulation (PWM), or pulse-duration modulation (PDM), is a modulation technique used to encode a message into a pulsing signal. Although this modulation technique can be used to encode information for transmission, its main use is to allow the control of the power supplied to electrical devices, especially to inertial loads such as motors. In addition, PWM is one of the two principal algorithms used in photovoltaic solar battery chargers, the other being MPPT.The average value of voltage (and current) fed to the load is controlled by turning the switch between supply and load on and off at a fast rate. The longer the switch is on compared to the off periods, the higher the total power supplied to the load.The PWM switching frequency has to be much higher than what would affect the load (the device that uses the power), which is to say that the resultant waveform perceived by the load must be as smooth as possible. Typically switching has to be done several times a minute in an electric stove, 120 Hz in a lamp dimmer, from few kilohertz (kHz) to tens of kHz for a motor drive and well into the tens or hundreds of kHz in audio amplifiers and computer power supplies.The term duty cycle describes the proportion of 'on' time to the regular interval or 'period' of time; a low duty cycle corresponds to low power, because the power is off for most of the time. Duty cycle is expressed in percent, 100% being fully on.The main advantage of PWM is that power loss in the switching devices is very low. When a switch is off there is practically no current, and when it is on and power is being transferred to the load, there is almost no voltage drop across the switch. Power loss, being the product of voltage and current, is thus in both cases close to zero. PWM also works well with digital controls, which, because of their on/off nature, can easily set the needed duty cycle.PWM has also been used in certain communication systems where its duty cycle has been used to convey information over a communications channel.
  • studyres.com © 2025
  • DMCA
  • Privacy
  • Terms
  • Report